Home / 318,089-686,009

Finding the Third Proportional to 318,089 and 686,009

Calculator

Solution

The third proportional to 318,089 and 686,009 is: 1,479,486.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,089 : 686,009 = 686,009 : x
  2. Step 2: Convert to fraction form
    318,089/686,009 = 686,009/x
  3. Step 3: Cross multiply
    318,089x = 686,009 × 686,009
  4. Step 4: Simplify right side
    318,089x = 470,608,348,081
  5. Step 5: Solve for x
    x = 470,608,348,081/318,089
  6. Step 6: Final answer
    x = 1,479,486.40

Related Problems

Find third proportional to 159,044.50 and 343,004.50
Half scale
Find third proportional to 636,178 and 1,372,018
Double scale
Find third proportional to 318,091 and 686,013
Similar ratio
Find third proportional to 477,133.50 and 1,029,013.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.